B.Tech

Please refer to the link provided below for details regarding a course in M.Arch from Sushant School of Art and Architecture. You can download their brochure which contains important details like eligibility, application dates, fee structures and contact information.
https://www.shiksha.com/architect

Candidates are eligible to apply for the FPM program if they fulfill either of the two following criteria:
Masters degree in any discipline with 55% marks (or grade point equivalent) throughout academic career(or)
Bachelors degree of at least four year duration (such as B.E./B.Tech./B. Arch.) from a r

You have to clear CAT but in my opinion, you should go for M.Tech because now a days, most of companies refused to hire students from science background.

Dear Raghib,
If you're aspiring to make a good career in IT, I will strongly suggest you to go for B.Tech-M.Tech combo. If you posses high skills in programming, then there is no problem pursuing it in an average college.
All the best for your future.